Insulating-bushing.



L. STEINBERGER.

INSULATING BUSHING. APPLICATION FILED JULY 12,1907.

Patented Nov. 17, 1908.

/NVENTOH lozzzls' yiez'nerger ATTORNEYS UNITED STATES PATENT OFFICE LOUIS STEINBERGER, OF NEW YORK, N. Y.

INBULATING-BUSEDTG.

I Specification of Letters Patent.

Patented Nov. 17, 1908.

Application filed m 13:, 1907. Serial No; 883,456.

Bushing, of which the clear, and exact descripings suchas may be employed in connection with high potential conductors and used at points where such conductors enter or leave a building or pass throu h a wall, panel, or-

other barrier of any kin Among the several objects sought to be accomplished b my improvements are the fOllOWlIl I. o secure the bushing as, a

whole re atively to its support so as to prevent the possibility of dislodgment. .II.

To provide the bushing with ,a number of concentric crowns, one projecting a little further than another, for'the purpose of increasin the surface, thereb preventing surface eaka e, and alsoof essening the chance for moisture to do any damage. III. To seal up a portion of the conductor so as to preclude the possibility of its being reached y moisture. IV. To provide the bushing with a collar detachably secured thereto for the purpose of tightemng or loosenin the bushing relatively to its support. .To

- build up the bushing of composite members detachably connected together and removable piecemeal. VI. To so fit these detachable members together as to improve their neral efficiency as insulating mem- II. To give the bushing a surface in material alternated with air spaces.

II. To provide a ring of insulating mate'rial having a metal portion for strength proving the insulation.

ening the insulation and at the same time afiording a strong portion for the reception of a wrench or other tool for tightenor loosening the ring. IX. To provide hushing with an extended shield for the pur .se or 131 expose of preventing the ready access ent of rain or snow into the 11d of thebushing and for im- X. To provide a ushing of such conformity as to enable the I operator to replace any of the several parts in casetheybecome. damaged or broken. XI. To provide a bushing of such conformity as to enable one to increase the insulation and the leakage surface at will.

Reference is to be had to the accompany-f ing drawings formin a partof this specification, in which simi ar characters of reference indicate corresponding parts in both the figures.

Figure 1 is an elevation showing how the bushing appears from outside the building; and ,Fig. 2 v is a central vertical section through a bushing made in accordance with my invention and built up of a plurality of concentric; cylindrical members terminating in crowns, this view showing also how the outer crown is extended so as to form a shed; thls view 1s taken on the line 22of Fig. 1. 1

At 3 is a barrier which may be a wall, a pane of glass, or a slabof insulating. material, through which the conductor is to be passed. This part is 4 threaded and enlarge at 5. A cylindrical member 6 of electrose or other suitable insulating material, is threaded externally and internally and fits into the hole 4. This cylindrical member is provided with an angrovided with a hole nular shoulder 7 constituting a conoidal por- 'tion and is further provided with an enlarged portion 8 projecting outwardl a considerable distance, and thinned slightly at 9 so as to form a shed. Anannular shoulder 10 representing, a plane at right angles to the axis of thecylinder 6 engages directly the barrier 3. The cylindrical member 6 is provided with a portion 11 smoothed" and tapered ofi' thin.

Encircling the cylindrical member 6 is an annular collar 12 of electrose or other insulating material, and the outer periphery of this is bounded by a metallic band 13 secured thereto by molding or in any other suitable manner. A set screw 1ft extends through the band, and holds the same against accidental movement. This band 13 is provided with one or more apertures 15 whereby it may be engaged by a spanner wrench for the purpose of turning'it and the collar 12 so as to tighten or loosen the collar 12.

The cylindrical member 6 is provided internall with an annular shoulder 16. A second cylindrical member 17 is provided with an annular shoulder 18 engaging the annular shoulder 16. This cylindrical member 17 tapers off thin at its ends which. are

smooth. Its middle, however, is threaded externally for the purpose of mating the inner surface ofthe. cylindrical member 6" which is also threaded.

A c lindrical member 19 is threaded about its mlddle for the purpose of, mating the pose. The threaded junction between the outercylindrical member 6 and the next cylindrical member 17 is shown at 23. The openings 24 in the cylindrical plugs 21, 22 are flared so as to prevent chipping of the material of the plugs, or abrasiona of the conductor. Intermediate of the cylindrical plugs is a cylindrical space 25. :The end oi the shed 9 terminates in a wavy line 26, the purpose of which is to give the construction a neat appearance, and, also; to increasethe protection'of the internal parts against the entrance of moisture, and to improve the insulation. The conductor is'shown at 27 and passes throughthe cylindrical plugs 21,

I 22 and the space 25.

From the above description the operation of my device will "be readily understood. The insulating bushing as awhole may be first assembled and then mounted in position in practically the same manner as if most of the parts were formed in a single space. If, however, it be desired to remove any one of the concentric cylindrical members, this can' be readily done by simply unscrewing the part or parts from the parts encircling the same. The shoulders 16,18 serve as llmiting stops and prevent any cylindrical member from being driven too far inward, and at the same time prevent the creeping. of moisture from one'end of the tube to the other. T. I

The plugs 21 and 22 may be made of a yielding material such as soft rubber, cork, etc., to more effectually prevent moisture from entering into the space 25.

' material out of which the scribed are formed. 1 pre er, however, to

I do not limit myself to any particular arts above deuse theinsulating material commonly known in this art as electrose Neither do I limit myself to any exact shape for any particular part nor tothe precise arrangement shown, nor do.I limit myself to makingthe bushing in every instance, of separable parts.

My invention may be employed, in any relation where it is desired to support or 'insillate a. conductor carrying high potential currents. It is of especial use in connection with wireless telegrahy wherein it is desirable to lead into t estation a conductor cylinder.

designated as the cows tail, and corresponding to the conductor 27.

Having thus described my invention, I f

projecting portion serving as a shed, the top .of said projectingportion extending further than the bottom part thereof, mechanism disposed within said outer member and for supporting a conductor extending through the same. a I

2. An insulating bushing comprising a "cylindrical member provided with a shoulder and with a thread, and further provided with a projecting portion serving as a shed, a barrier provided with a portion engaging said shoulder, and means for supporting a conductor extending through said cylindrical member.

3. 'An insulating bushing comprising a plurality of concentric cylinders of insulating material threaded 'and fitted one into another, one of said cylinders being provided with a shoulder engaged by another of said cylinders-and serving as a limiting stop therefor, the outermost of said cylinders being provided with a projecting portion serving as a shed.

4:. An insulating bushing comprising a plurality of concentric cylinders detachably engaging one another, each tapering off thin at its ends so as to form air spaces between successive pairs of cylinders, the outermost of said cylinders having a project ing portion serving as a shed, and means for supporting a conductor within the innermost 5. An insulating bushing comprising a plurality of concentric cylinders, one being provided with 'a' portion projecting a considerable distance beyond the others so as to serve as a shed, and means for supportin 'aconductor withln the mnermost of sai cylinders.

6.A11 insulating bushing comprising a cylindrical member for shielding a conductor, said cylindrical member having a greater diameter at one of its ends than at the other, said end of greater diameter being provided withfa projecting portion serving as a shed.

7. An insulating bushing comprising a provided internally with a shoulder, said cylindrical members bein fitted one into another" concentrically so t at the internally disposed shoulder of one cylinder fits against the externally disposed shoulder of another cylinder, and means for supporting the outermost of said cylinders.

8. An insulating bushing comprising a cylinder provided with a portion for en agmg a barrler, and also provided wit a threaded portion, a threaded collar of insulating material mounted upon. said threaded portion and adapted to engage said barrier,

and a metallic band encircling said collar so as to strengthen the same.

9. An insulating bushing comprising a central cylindrical member of insulating material provided at its middle with a threaded portion and at its ends with smooth portions,

said cylindricalmember being further provided with a shoulder, and a sup orting cylindrical member engaging sai threaded portion and engaging said shoulder.

10. An insulating bushing comprising a plurality of concentric c linders of insu atmg material each rovi ed both externally and internally wit a shoulder, said cylinders being detachably fitted one into the other, and means for supporting the outermost of said cylinders.

11. An insulating bushin comprising a cylindrical member provide with acentral space through which a conductor may be extended, and further provided with a threaded middle portion, a supporting member engaging sald threaded middle portion, and plugs en ging the ends of said cylindrical member or the purpose of supporting a conductor extending therethrough.

12. An insulating bushing comprising a cylindrical member rovided internally with a shoulder and wit a middle supporting portion, a second cylindrical member disposed within said first-mentioned cylindrical member and provided with a portion enthe outermost of said cylindrical members being longer than the innermost, and means for supporting-the outermost. of said cylindrical members.

14. An insulator comprisin member and an inner member, ho

an outer th of substantially cylindrical form, said inner member bein provided externally with a thread and sai outer member being provided internally with a thread, said threads mating each other for the purpose of detachably connecting said inner member and said outer member together by their middle portions, said members being provided withend portions tapering oif in thickness and separated.

from each other.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

- LOUIS STEINBERGER.

Witnesses:

Evnnxnn B. MARSHALL, WALTON HARRISON. 

